sod over crabgrass.

Discussion in 'Turf Renovation' started by RigglePLC, Aug 29, 2012.

  1. Totally agree. CG is a perennial weed here in a Florida. I now at right height and it will still show up. I agree, it's all about a tolerance level for the customer.
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  2. Think Green

    Think Green LawnSite Silver Member
    Posts: 2,746

    Florida members,
    With the amount of sandy soil conditions, it appears to me that Pre-M products will not stay in the soil anyway. If there is no clay or organic mater to bond to.....the product just washes down and out.l
    What is your proven methods for sandy loam soils.?
    I have quite a few that is sandy loam and have to switch from Pendimethalin to Prodiamine and then finally to Simazine after frost.
    This kicks my butt as it is time consuming but gets the job done. We don't have the long season of growing you do in the tropic zone...............I guess this is a big factor for you guys.
     
  3. I'm not licensed to do lawn apps. But CG is a year round weed here. If we get a freeze, it will kill off what's there, but that is a big if. From GA north, you guys can pretty much count on CG to die in winter, not the same in Florida. In Florida, there are 3 certainties in life. Death, taxes, and year round Crabgrass.
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  4. RigglePLC

    RigglePLC LawnSite Fanatic
    Posts: 12,070

    Here is the result so far, after 18 days. Sod was laid on top of crabgrass with no preparation whatsoever, in late August. Temps about 85, but trending downward, 78 today, 44 degrees last night. Weather was mostly dry so it turned brown, but since then I have been watering it with a hose a few minutes a day. Beginning to tack down. Looks slightly better.

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  5. RigglePLC

    RigglePLC LawnSite Fanatic
    Posts: 12,070

    With his OK, I laid a roll of sod on top of a heavily crabgrass-infested part of my neighbor's lawn, (not irrigated). By 24 days, September 17 the sod had killed the crabgrass and good grass underneath it. The sod had tacked down and settled in slightly. It turned brown at first, in the first three days--and then I began to water it for a few minutes every day. Then my neighbor hired some kid to mow it with a lawn tractor--and it was scalped due to the slope near the road. Recovering slowly.

    Crabgrass is looking a bit brownish. Low temp last week was 44. Light rain tonight.
    A single sprout of nutsedge has appeared in the sod. A few small grubs have appeared.

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  6. Smallaxe

    Smallaxe LawnSite Fanatic
    Posts: 10,080

    It's amazing how much abuse grass plants can take and still survive this time of year...
     
  7. troyd1

    troyd1 LawnSite Member
    Posts: 2

    Hi Guys, Just wanted to share a trick I have used that has worked for me.
    If I have an area of exclusive weeds I will put down one sheet of ordinary newspaper and a little growing medium on top of the paper.
    Then I put my seed and a little dead grass, straw, whatever.
    If you get your timing right your seed will fill in the area before the weeds can push through the paper. Paper stays moist a little longer than general soil also.
    Here it is organics or nothing as chemicals are prohibited. Have had decent success with this method. Joined this site after years of lurking just to post this. All you Canadians better try it or I will be disappointed.
     
  8. Smallaxe

    Smallaxe LawnSite Fanatic
    Posts: 10,080

    That is a good idea for a lot of annual weeds,,, however,,, perennial weeds simply use the mulch type covering to expand its root base and will definately out perform the young grass to a large extent...

    There is no panacea for any type of weed control and it is necessary to understand what you are dealling with... in fact: this strategy can promote the sudden appearance of Canadian Thistle which is beyond control in one season... I experienced that back in the 70's(and several times since then), so be careful how you proceed... :)
     
  9. troyd1

    troyd1 LawnSite Member
    Posts: 2

    In order for it to succeed you have to seed when weeds are all done. It is never perfect. But is has merit.
     
  10. RigglePLC

    RigglePLC LawnSite Fanatic
    Posts: 12,070

    Interesting method, Troy! You are in a no chemical area. So you are saying cover a weedy area with a sheet of newspaper and add soil on top. How much soil?
    Is the newspaper thick enough to block the light--(thereby killing the weeds) and yet thin enough to allow the grass roots to penetrate into the soil, and thin enough to decompose in a few months (permitting normal grass growth)?
    Would this kill any good grass along with the weeds?
     

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